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Application filed by Jan Dvorak, Petr Matula, Vladimir Ing Matula, Drahomir Ing VranafiledCriticalJan Dvorak
Priority to CS8410576ApriorityCriticalpatent/CS242816B1/en
Publication of CS1057684A1publicationCriticalpatent/CS1057684A1/en
Publication of CS242816B1publicationCriticalpatent/CS242816B1/en